Alert archive / Michigan / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 719
The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2011, 5:22 PM CDT for 5 states. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2011, 5:22 PM CDT (22:22 UTC)
- Expired
- Aug 3, 2011, 2:28 AM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 100 counties
Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Monroe County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Kenosha County, WI, Milwaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI
The radar
The Grand Rapids radar (KGRR), 122 km from the middle of the area, began a volume at 22:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:35 PM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 40 min |
| Aug 2, 5:36 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 54 min |
| Aug 2, 5:49 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Walworth | 41 min |
| Aug 2, 5:54 PM CDT | Severe Thunderstorm Warning | MKX | Racine | 21 min |
| Aug 2, 5:56 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kane, Lake, McHenry | 70 min |
| Aug 2, 7:33 PM CDT | Severe Thunderstorm Warning | IWX | Berrien, Cass | 57 min |
| Aug 2, 7:59 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle, Winnebago | 61 min |
| Aug 2, 8:17 PM CDT | Severe Thunderstorm Warning | IWX | Branch, Cass, Saint Joseph | 20 min |
| Aug 2, 8:39 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Cook, DeKalb, DuPage, Kane, Lake and 1 more | 66 min |
| Aug 2, 8:45 PM CDT | Tornado Warning | LOT | DeKalb, Lee, Ogle | 34 min |
| Aug 2, 9:11 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 64 min |
| Aug 2, 9:18 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 72 min |
| Aug 2, 9:33 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Grundy, Kendall, LaSalle, Lee | 57 min |
| Aug 2, 9:40 PM CDT | Severe Thunderstorm Warning | GRR | Mecosta, Newaygo | 73 min |
| Aug 2, 10:01 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, LaSalle, Will | 59 min |
| Aug 2, 10:07 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 68 min |
| Aug 2, 10:36 PM CDT | Severe Thunderstorm Warning | IWX | Elkhart, Fulton, Kosciusko, LaPorte, Marshall, Pulaski and 2 more | 84 min |
| Aug 2, 10:39 PM CDT | Flash Flood Warning | GRR | Lake, Mecosta, Newaygo | 6 hr |
| Aug 2, 10:52 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Will | 68 min |
| Aug 2, 11:15 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston, Will | 41 min |
| Aug 3, 12:07 AM CDT | Severe Thunderstorm Warning | IWX | Pulaski, White | 38 min |
| Aug 3, 12:08 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 52 min |
| Aug 3, 12:29 AM CDT | Severe Thunderstorm Warning | IWX | Huntington, Kosciusko, Wabash, Whitley | 36 min |
| Aug 3, 12:29 AM CDT | Severe Thunderstorm Warning | IWX | White | 29 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.4 hours before the alert went out and 254 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 286 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 346 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:19 AM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 4 more | 86 min |
| Aug 2, 12:57 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 20 more | 93 min |
| Aug 2, 1:25 PM CDT | Mesoscale Discussion | SPC | Allegan, Arenac, Barry, Bay, Benzie, Branch and 41 more | 95 min |
| Aug 1, 9:40 PM CDT | Mesoscale Discussion | SPC | Burnett, Douglas, Polk, Washburn | 95 min |
| Aug 1, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Burnett, Douglas, Washburn | 7 hr |
| Aug 2, 1:24 AM CDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Clark, Douglas, Dunn and 13 more | 96 min |
| Aug 2, 2:20 AM CDT | Severe Thunderstorm Watch | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Clark and 24 more | 10 hr |
| Aug 2, 3:32 AM CDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Clark, Douglas, Dunn and 13 more | 88 min |
| Aug 2, 5:23 AM CDT | Severe Thunderstorm Watch | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 11 more | 7 hr |
| Aug 2, 9:02 AM CDT | Mesoscale Discussion | SPC | Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 4 more | 58 min |
| Aug 2, 11:51 AM CDT | Mesoscale Discussion | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 11 more | 24 min |
Nearby
Severe Thunderstorm Watches in Michigan, 2011Severe Thunderstorm Watches in Indiana, 2011Severe Thunderstorm Watches in Illinois, 2011Every severe thunderstorm watch in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.